What is one focus that is similar between communist and socialist platforms?

The main similarity of Socialism and Communism is that their main economic philosophies that are advocated are that public rather than private ownership of the means of production, distribution, and exchange of goods. The government is the one that regulates the production of goods and there is no regulation of prices by the market, instead, the prices are all regulated by the government.

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation:

a, he promoted disarmament